수도권매립지수목생육과토양환경의관계연구

Study on Tree Growth and Soil Environment Relations of Sudokwon Landfill

본 연구는 수도권매립지에서 매립이 완료된 제 1매립장 사면에 식재된 수목과 토양환경 간의 상관관계를 규명하고자 수행하였다. 제 1매립장 사면에 식재된 주요 수목 26종을 대상으로 69개의 식생 조사구조사구($7{\sim}20m{\times}5{\sim}20m$) 를 설치하여 2007년부터 2009년에 걸쳐 조사하였으며, 토양분석은 2007년부터 2008년까지의 수목 생육불량률 기준으로 수목 생육불량 지표종을 선정하고 지표종의 생육정도에 따라 7개의 조사구를 선정하여 토양을 채취하고 분석하였다. 수도권매립지 환경 적응양호 종은 총 10종으로 침엽수는 곰솔(묘목), 향나무로 2종이었으며, 활엽수는 갈참나무, 능수버들, 밤나무(묘목), 살구나무, 상수리나무, 이팝나무, 튤립나무(묘목), 팽나무로 8종이었다. 적응불량인 수종은 총 8종으로 침엽수 2종, 활엽수 6종이었다. 판단보류는 총 8종으로 침엽수 1종, 활엽수 7종이었다. 수목 생육불량 지표종은 불량률이 25% 이상인 종을 중심으로, 개오동나무, 회화나무, 자귀나무, 단풍나무를 선정하여 식재지의 토양환경을 분석하였다. 토양분석결과, 토양산도는 염기성토양이었으며, 토양 삼상은 고상률 60% 이상이거나 55% 이하이지만 기상이 10% 이하인 지역이 대부분이었고, 유기물 함량은 0.14~2.52%이었다.

This study investigated the correlation between the trees planted on the slope of the first landfill where the landfill was completed and the soil environment. 69 plots (($7{\sim}20m{\times}5{\sim}20m$) were planted with 26 kinds of major trees in the first landfill slopes for vegetation survey. The survey was conducted from 2007 to 2009. Soil analysis from 2007 to 2008 was made on the basis of the injured index and the indicator species were selected. Depending on the rate of growth of the indicator species, seven survey locations were selected for soil sample analysis. 10 tree species appeared to adapt to the landfill environment. Among them, the coniferous trees were Pinus thunbergii (Seedling) and Juniperus chinensis and the deciduous trees were Quercus aliena, Salix preudo-lasiogyne, Castanea crenata (Seedling), Prunus armeniaca var. ansu, Quercus acutissima, Chionanthus retusus, Liriodendron tulipifera (Seedling) and Celtis sinensis. 8 species of trees did not adapt well to the landfill environment. Among them, two kinds were coniferous, the other six kinds were deciduous. In addition, judgment on the other 8 species of trees as to whether they adapted well or not was postponed. The species for which judgment was postponed included one coniferous tree and seven deciduous trees. Indicator species of injured index was the species that have more than 25 % of the defect. The soil was collected from where Catalpa ovata, Sophora japonica, Albizzia julibrissin and Acer palmatum were planted for analysis. According to the soil analysis, the soil pH showed that the soil was alkaline. Regarding the three phases of the soil, most sample soil showed 60 % for the solid phase or 55 % for the solid phase but with less than 10 % of gas phase. The organic matter content was found to be 0.14 to 2.52 %.